The Controlled Unclassified Information (CUI) blog is an educational and informative resource, run by the CUI Executive Agent, to support implementation of the Federal CUI Program established under Executive Order 13556. The purpose is to promote a better understanding of the Program’s purpose and how it works. If you are looking for authoritative policies and guidance on the CUI Program, please visit the CUI Registry at www.archives.gov/cui. The CUI Registry is the Government-wide online repository for Federal-level guidance regarding CUI policy and practice. However, agency personnel and contractors should first consult their agency’s CUI implementing policies and program management for guidance.